/**
 * 
 */
package org.yaoxuan;

/**
 * @author shawn
 *
 */
public final class SecurityManager {
	
	private static SecurityManager instance = null;
	
	private SecurityManager() {
		
	}
	
	
	public static SecurityManager getInstance() {
		
		if (null == instance) {
			synchronized(instance) {
				if (null == instance) {
					instance = new SecurityManager();
				}
			}
		}
		
		return instance;
	}
	

}
